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Wavelet-based Frequency Response Function for time-variant systems-An exploratory study

机译:基于小波的时变系统频率响应函数的探索性研究

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摘要

A wavelet-based Frequency Response Function (FRF) is proposed for vibration analysis of systems with time-varying parameters. The classical FRF is extended to a representation in the combined time-frequency domain using wavelet analysis. Time averaging is performed on the initial FRF to improve signal-to-noise ratio. It is shown that use of the wavelet ridge algorithm is effective in extracting and representing visually data from wavelet-based FRFs. The wavelet-based FRF is demonstrated on selected time-variant simulated lumped parameter systems and one experimental vibrating system.
机译:提出了一种基于小波的频率响应函数(FRF),用于时变参数系统的振动分析。使用小波分析将经典FRF扩展为组合时频域中的表示。对初始FRF执行时间平均以提高信噪比。结果表明,使用小波脊算法可以有效地从基于小波的FRF中提取和可视化数据。在选定的时变模拟集总参数系统和一个实验振动系统上演示了基于小波的FRF。

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